langdon



(No Model.) 2 Sheets-Sheet 2.

- N. 1v1. LANGDON.

GAS PRODUCING FURNAGE.

Patented MM. 11, 18847.

UNiTn' STATES NELSON LANGDON, OF CHESTER, NEV JERSEY.

GAS-PRODUCING FURNACE.

SPECIFICATION forming part of Letters Patent No. 294,796, datedA March11, 1884.

' 1 Application filed May 28, 1883. (No model.) v i To @ZZ whom t mayconcern:

Be it known that I, NELSON M. LANeDoN, of Chester, in the State of NewJersey, have invented certain new and useful-Improvements inGas-Producing Furnaces; and I do hereby declare the following to be afull, clear, and eX- act description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

My invention relates to an improvementin gas-producing furnaces 5 and itconsists in the parts and combinations of parts,as will be more fullydescribed, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in vertical section,the right half of the gure being taken through the gas-exit flue,injector, and tuyere, and the left half through the door-passage. Fig. 2is a plan view. Fig. 3 is a 4horizontal sectional view, showing thearrangement of the doors, tuyeres, and injectors. Fig. 4 is a detachedview of one of the injectors, and Fig. 5 is a view in front elevation ofone of the doors.'

A represents an upright shaft-furnace, preferably cylindrical in shape,having a bosh, B, formed by the inclined or sloping walls thereof.

VImmediately below the bosh, and in direct communication therewith, arethe doors and combined steam and air passages, while the gasexit passageis connected to the furnace near the top thereof.

The small tuyeres or passage-ways a, situated immediately under and incommunication with the bosh B, are bifurcated at their inner ends,forming two distinct flues, which together with the door-passages b,terminate in the central chamber, C,while the outer ends ofthe tuyeres aare in direct communication with the injectors D, through which blastsof commingled steam and air are forced in the usual manner.

Small passages or flues c connect the injectors and door-passages b, anda portion of the blast ofcommingled steam and air, entering thedoor-passage?) through the fines c,prevents the door E from getting toohot and warping.

The doors E, tofacilitate cleaning, are placed opposite each other, sothat a continuous passage-way is formed through the furnace.

The door-frames E are rmly secured in the furnace, and each is providedon opposite sides with the outwardly-extending arms d, which lattersupport the doors. Each arm is provided on its upper face with awedge-shaped groove or recess, into which correspondinglyshaped lugs e,formedintegral on oppositesde edges of the door, rest. Thus it will beseen thatwhen the door, which is removable, isrested on the side arms ofthe door-frame the weight thereof causes it to move down the wedgeshapedrecesses in the side arms of the said frame and fit snugly against thedoor-frame, the contact-surfaces between the door-frame and door beingplaned, so as to form practically an air-tight j oint. Each doorisprovided centrally with a female screwthreaded recess, f, into which apiece of gas-pipe canbe secured for the purpose of forming a handle bywhich the doors can be conveniently removed and reset when necessary.

F is a hopper situated in the top of the furnace for the purposey ofintroducing the fuel. This hopper is secured to the furnace in asubstantial manner, and is closed by the bell G, which latter is held inplace by the weighted forked lever I. This lever is fulcrumed to thestandard J, and the two arms g thereof, which terminate over the bell G,are connected to the said bell by thelinks h, the lower ends of whichlatter are pivotally secured tothe guide-flanges fi. The center or apexo f the bell Gis provided with an opening, through which abar may beintroduced for punching or spreading out the fuel in the producer. Vhenthis opening is not in use, it can be closed by a suitable plug toprevent the escape of any gas.

The gas-exit ue K is connected to the furnace near the top thereof, andis provided with the valve ring or seat j, secured in the wall thereof,on which the valve rests. This valve L is connected to the lower end ofthe notched bar M, which latter passes upwardly through the slot in theplate Nand terminates in ahandle by which it is grasped. The plate Nalso forms a seat for the pawl O, which latter is adapted to engage thenotched bar for the purpose of holding the valve in an elevatedposition.

To produce gas inthe furnace the fuel is first ignited and thecombustion maintained and gas generated by the introduction through theIOO tuycres or flues by means ofthe steam-j etinjeetors of a blast ofcoinmingled steam and air. A portion of this blast passes through iues cinto the door-passages b, and serves to prevent the doorsE from becolninover-heated and Warped. Then the furnace is first started, the Valve Lis closed until the heat attained is sufficient to decompose the steain,after which it is opened and the gas generated allowed to pass into asuitable receiving` tank or reservoir.

Having fully described my invent-ion, what I elaini as new, and desireto secure by YLetters Patent, is-

l. The combination7 with a chamber encircling the bosh, door-passageslocated on dianietrieally opposite sides ofthe bosh and eo1nninnieatingat their outer ends with said encircling` chamber and at their innerends with the combnstion-chamber7 and tuyeres located between saiddoor-passages and on opposite sides ofthe bosh, of the stea111-jetblastinjector for NELSOX M. LANGDO.

fitnessesz Isliiio Hnxcn, DAYID SWACKHMIER, Iris. l-l. Nmorrnonn.

